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Technical requirements for the use of cables in explosion-proof construction sites

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| 2021-09-09|Return

1. Electrical circuits should be laid in areas with low explosion hazards or far away from the release source, avoiding places that are prone to mechanical damage, vibration, corrosion, dust accumulation, and hazardous temperatures. When unavoidable, preventive measures should be taken.

2. The selected low-voltage cable or insulated wire must have a rated voltage higher than the operating voltage of the line and not lower than 500V. The insulated wire must be laid inside the conduit.

3. 10kV and below overhead lines are strictly prohibited from crossing explosive gas environments; The horizontal distance between overhead lines and explosive gas environments should not be less than 1.5 times the height of the tower.

74. When installing cables and their accessories, their positions should be able to prevent external mechanical damage, corrosion, or chemical effects (such as solvent effects), as well as high temperature effects (see also for this safety circuit) according to the actual situation. If the above situations cannot be avoided, protective measures should be taken during installation, such as using conduits or selecting cables (to minimize damage, armored cables, shielded wires, seamless aluminum sheathed wires, mineral insulated metal sheathed or semi-rigid sheathed cables can be used).

5. Unsheathed single core wires should not be used as conductive wiring unless they are installed in distribution boards, enclosures, or conduit systems.

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